Measurement of the Three-Dimensional Flow Field Behind an Axial Compressor Stage

1977 ◽  
Vol 99 (2) ◽  
pp. 168-179 ◽  
Author(s):  
Ch. Hirsch ◽  
P. Kool
Keyword(s):  
Flow Field ◽  
Measurement Technique ◽  
Three Dimensional ◽  
Axial Compressor ◽  
Turbulence Level ◽  
Compressor Stage ◽  
Hot Wire ◽  
Three Dimensional Flow ◽  
Dimensional Flow

Hot wire instrumentation and a periodic sampling and averaging technique have been used in order to measure the three-dimensional flow field behind a rotor of an axial compressor stage. A single slanted rotating wire allows the determination of the three components of the blade-to-blade velocity distribution together with informations on the turbulence level. A description is given of the measurement technique, and typical experimental results are presented.

The Three-Dimensional Flow and Blade Wake in an Axial Plane Downstream of an Axial Compressor Rotor

1978 ◽  
Author(s):  
P. Kool ◽  
J. DeRuyck ◽  
Ch. Hirsch
Keyword(s):  
Three Dimensional ◽  
Axial Compressor ◽  
Axial Plane ◽  
Hot Wire ◽  
Three Dimensional Flow ◽  
Dimensional Flow ◽  
Wall Boundary Layer ◽  
Compressor Rotor ◽  
Three Dimensional Finite Element ◽  
Flow Variables

The three-dimensional flow field has been measured in an axial plane downstream of a low speed axial compressor rotor with a rotated single slanted hot wire. A method is described which allows one to calculate three mutually perpendicular velocity components from hot-wire data, and use is made of the technique of periodic sampling and averaging to extract the pitchwise fluctuating flow from the stationary hot-wire signals. These data contain useful information. The radial distribution of the pitchwise averaged flow variables is compared with classical pneumatic measurements and with the results of a quasi three-dimensional finite-element calculation and a three-dimensional end-wall boundary layer calculation. Finally, the wake characteristics are given and a simple correlation is presented which allows one to determine the wake velocity defect from a single wake shape factor.

scholarly journals The Turbine Regime of a Rear Axial Compressor Stage

1990 ◽  
Author(s):  
Václav Cyrus
Keyword(s):  
Aspect Ratio ◽  
Three Dimensional ◽  
Axial Compressor ◽  
Compressor Stage ◽  
Flow Mechanism ◽  
Three Dimensional Flow ◽  
Low Speed ◽  
Dimensional Flow ◽  
Blade Row ◽  
Stator Blade

A detailed investigation of three-dimensional flow has been carried out in a low speed rear axial compressor stage with aspect ratio of 1 at the extreme off-design condition-turbine regime. Measurements were performed by means of both stationery and rotating pressure probes. The mechanism of flow in the rotor and stator blade row in the turbine regime is analysed. Comparison is made with flow mechanism at the design condition.

Effect of the Inlet Velocity Profile in the Three-Dimensional Flow in a Rear Axial Compressor Stage

1988 ◽  
Vol 110 (4) ◽  
pp. 434-440 ◽  
Author(s):  
V. Cyrus
Keyword(s):  
Velocity Profile ◽  
Three Dimensional ◽  
Axial Compressor ◽  
Design Flow ◽  
Flow Coefficient ◽  
Intensity Level ◽  
Compressor Stage ◽  
Three Dimensional Flow ◽  
Inlet Velocity ◽  
Dimensional Flow

A detailed investigation of the three-dimensional flow was carried out in a low-speed rear axial compressor stage with an aspect ratio of 1. Experimental data were obtained for both an inlet velocity profile with thin endwall boundary layer thickness and a distorted inlet velocity profile with a high turbulence intensity level. The distortion was produced by a specially designed screen. The flow mechanism in the rotor and stator blade rows is analyzed for these two velocity profiles at the design flow coefficient.

Three-Dimensional Flow Field in Rocket Pump Inducers—Part 2: Three-Dimensional Viscid Flow Analysis, and Hot Wire Data on Three-Dimensional Mean Flow and Turbulence Inside the Rotor Passage

1977 ◽  
Vol 99 (1) ◽  
pp. 176-186 ◽  
Author(s):  
B. Lakshminarayana ◽  
C. A. Gorton
Keyword(s):  
Flow Field ◽  
Flow Behavior ◽  
Three Dimensional ◽  
Flow Coefficient ◽  
Experimental Investigations ◽  
Complex Nature ◽  
Hot Wire ◽  
Mean Flow ◽  
Three Dimensional Flow ◽  
Dimensional Flow

This paper reports the measurement and prediction of the three-dimensional flow field in an axial flow inducer operating at a flow coefficient of 0.065 with air as the test medium. The experimental investigations included measurement of the blade static pressure and blade limiting streamline angle, and measurement of the three components of mean velocity, turbulence intensities and turbulence stresses at locations inside the inducer blade passage utilizing a rotating three-sensor hot-wire probe. Analytical investigations were conducted to predict the three-dimensional inviscid flow and to approximately predict the three-dimensional viscid flow by incorporating the dominant viscous terms into the exact equations of motion in rotating coordinate system. Radial velocities are found to be of the same order as axial velocities and total relative velocity distributions indicate a substantial velocity deficiency near the tip at mid-passage. High turbulence intensities and turbulence stresses are concentrated within this core region. Evidence of boundary layer interactions, blade blockage effects, radially inward flows, annulus wall effects and back-flows are all found to exist within the long, narrow passages of the inducer, emphasizing the complex nature of inducer flow which makes accurate prediction of the flow behavior extremely difficult.

scholarly journals Measurement of Three Dimensional Flow Field behind on Impeller by Means of Periodic Multi-sampling with a Slanted Hot Wire

1982 ◽  
Vol 25 (209) ◽  
pp. 1674-1681 ◽  
Author(s):  
Motoo KUROUMARU ◽  
Masahiro INOUE ◽  
Takao HIGAKI ◽  
Farouk Abd-Elaziz ABD-ELKHALEK ◽  
Takefumi IKUI
Keyword(s):  
Flow Field ◽  
Three Dimensional ◽  
Hot Wire ◽  
Three Dimensional Flow ◽  
Dimensional Flow

Experimental Study of Three-Dimensional Flow in an Axial Compressor Stage

1986 ◽  
Author(s):  
Vaclav Cyrus
Keyword(s):  
Three Dimensional ◽  
Axial Compressor ◽  
Loss Coefficient ◽  
Flow Coefficient ◽  
Compressor Stage ◽  
Three Dimensional Flow ◽  
High Loss ◽  
Dimensional Flow ◽  
Blade Row ◽  
Stator Blade

A detailed investigation of three-dimensional flow was carried out in a low speed axial compressor stage with aspect ratio of 2. Data were obtained over a range of flow coefficient. The origin of large high loss regions in each blade row was found by means of a diffusion factor. The loss coefficient of rotor and stator blade rows was established on the basis of both rotating and stationary pressure probes. The predicted rotor and stator loss coefficient was compared with experiment.

Simulation of Three-Dimensional Flow Field Around Unconventional Bridge Piers

2017 ◽  
Author(s):  
Adnan Ismael ◽  
Hamid Hussein ◽  
Mohammed Tareq ◽  
Mustafa Gunal
Keyword(s):  
Flow Field ◽  
Three Dimensional ◽  
Bridge Piers ◽  
Three Dimensional Flow ◽  
Dimensional Flow
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